7705 SAR Interfaces
170
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
Figure 22 Network Example For LLDP
3.5.1 LLDP Protocol Features
LLDP allows stations attached to an IEEE 802 LAN to advertise to other stations
attached to the same LAN, the major capabilities provided by the system
incorporating that station, the management address or addresses of the entity or
entities that manage these capabilities, and the identification of the station's point of
attachment to the LAN required by the management entity or entities.
The information distributed via this protocol is stored on the receiving device in a
standard MIB, so that the information can be accessed by a Network Management
System (NMS).
The LLDP protocol uses an LLDP agent entity that implements LLDP for a particular
MAC service access point (MSAP) associated with a port.
LLDP does not contain a mechanism for soliciting specific information from other
LLDP agents, nor does it provide a specific means of confirming the receipt of
information. LLDP allows the transmitter and the receiver to be enabled separately;
therefore, the local LLDP agent can be configured to transmit only, receive only, or
both transmit and receive LLDP information.
LLDP agents transmit and receive LLDP Data Units (LLDPDUs). The LLDPDU
contains an LLDP frame whose information fields are a sequence of variable-length
information elements. Each element includes type, length, and value fields (known
as TLVs).
• Type identifies what kind of information is being sent.
• Length indicates the length of the information string in octets.
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